Counter scale



Sept. 11,1928.

H. M- CAMERON- V COUNTER SCALE Filed avf 1924 Patented Sept. 11, 192 8.

UNITED STATES PATENT OFFICE.

HUGH M. CAMERON, OFNEWYOBK, N. Y., ASSIGNOR T0 ELDER & RoB Nso'N, A 00- PARTNERSHIP, or cnroneo, rumors; consrscrnve or EARL. B; ELDER, a.

ROBINSON; AN D A. ROBINSON. I

COUNTER soALn- Application filed May 6,

The invention relates to scales of the even balance, counter type adapted for quick determination of exact weight, and has for its objects to producesuch a scalewhich will automatically compensate for the movement,

and correct the travel error of the beam due are designated by corresponding characters of reference,and in which. i

Fig. 1 is a plan view of a simple form of counter scale embodying the invention,

Fig. 2 is a front elevation of the same, with parts broken. away Fig. 3 is an end elevation of the same. Fig. 4 is a detail view of a formot bearing for the dial, and v I Fig. 5 is a diagram showing the operation ot'thebeam i In the drawings 1 designates abase carrying a pair of standards 2011 which is pivoted, by means of knife'edgebearings 3, an open beam or lever 4. The beam is provided at its opposite ends with knife edge bearingst, 5 and 6, 6 on each pair of which is mounted a yoke 7 or 8 as the case may be, and. each yoke carries a pan 9 .or 10, the pans being above the pivotal line of the beam. .The yokes 7 and 8 have pivoted to themlinks'll .and'12 respectively, which are pivoted to the base, as by'means of a pin 22 in vertical alinement with the pivot 3. Each link is pivoted ati23 .or 24, as the case may be, to an extensionof its yoke, and said pivots are spaced from the pivot 22 the same distance the pivotal points 5 and 6 arespaced from the pivot 3, andv the links will always be parallel to the beam'4 whereby to retain the pans in aepositio'n wheretheir surfaces will always be in the horizontal position. The base'carries adash pot 13 the piston of which is carried by the 1924, Serial No. 711,313.

beam whereby the movements of the beam will be damped, and a pointer. or finger'14 is. rigidly secured to and extends upward at right angles to the beam 4. a

Theapparatus as above described, is the usual counter scale on which awweight is placed on one pan 901' 10 and the commodity to be weighed is placed on'the otherpa-n until the beam 4 reaches rium.

the position of equilib- V 1 Pivotally carried on the base 1 and in line withthe pivotal points of the beam 4 is an I upwardly extending'arm 15, theupper BX-m tremity of which carries a dial 16 with which the pointer 14 cooperates. The arm is carried in suitable bearings and, as shown, is mount ed in standards 17 carried on the base 1. In

the embodiment of the invention illustrated the dial ar1n15 is mounted on roller bearin ona pin 25 carried by the standards 17 and in axial alinement with the pivoted point 3, as shownin Fig. 4. The arm 15 extends below the pivotal point thereof and carries a counterweight. 18 wherebythe arm will be maintained in theyertical position and the po1nter 14 will co ncide with the center or zero point of the dial when the beam 4 is in In the embodiment of the invention illustrated the beam 4 is providedwith two cross bars 19, 19-one on each side of the pivotal point of the beam and equally spaced therefrom.

Depending from eachbar, and preferably in the longitudinal center line of the beam 4, is a preferably spherical compensa.ting weight or pendulum 20,20, said weights being of equal specificgr-avitya The weights are rigidly secured to the beam 4 and at the same -di'stance below the pivotal line thereof and at the same distance frombut on opposite sides of the vertical planeof the pivotal line,.theretore, asthecenters of'the' weights are at the same distance fro-m the pivotal point of the; beam they will, when thebeam moves on its pivot, travel in the same are on either side of the pivotal point and in opposite direct-ions relatively to the horizontal and Vertical jplanes ot'the pivot each correcti mg, or neutralizing, the travel error of the other and, because of the high specific gravity of distance-below the szuaney the travel' error ot the beam \Vlll be corrected, to give any required compensation on the dial.

Preferably the weights and adjusted toward or away "from the horizontal pivotal line of the bean-w This'adfiastine'nt may be accomplished by screw threading each.

\n'eight on the lowerend of an ar'fi QT'thcf ter' being integral with, or r1 grdly securedito,

" the beam As will be seen from the cli'izwirigs, ,t=he' pivot of the'd'i'al *arm 15 isin aXial-alinelment Witlr' the pivotal points'3',3 of the beam-4;

' 'l he'operatioiris as follows I With the parts in the position shown in Figpl andiniirl-l li-rres in Fig. 5, a*p'ou-n d, weight, for example, 1s placed in the pa'nlO and! the'beam 4t; and-p'cnd'nlinns 2O and-" 20* will assume-the position-l'ndicated 'mdot and weighed is poured "into the pan 9 and the beam willmove toward its nor-11ml, balanced os'mom The pendu'linnia wln-le't'ra-voling on the same "are have difl'e'i ei-it valn'es becaii sect their positionsrelatively to the verticallrrre and'theliorizontallinejli 6! The va-l'tre of the pendulUmQO will'decrease as itis moved downward and toward the line and Y the val-1 1e, of 2-0 will increase as it appreachesthe line 56-.'- 'Fhiswjill col-npensate for the unequar angular" inovementi of the beam and'correct thegti'a-vel error; and cause the beam teftravel'at tl-iesaine align-lat" speed alncl dist'ance for each equal increment placed inthe pan 9' wli ereby'wlrenlicences arein' the pan 'thepointer M will, indicate loz; on"

the rig-ht end'otthediah Aseach eighth ounce is placed on the pan the pointer willmove one-'spaceonthe dialwhereby the exact weight will-b equic-kly"andea'sily obtained.

Because of the fact that" the movement of the beam is; compensated 1 for; and the travel error corrected; the calibrations on the dial areequidi-stant; If there be no such correc- 3 tion' tlie'dist'ance between'the' niarkswould diminish toward the center and said marks would so close together as to makeread: inwdiflieult; v I i 'Each'pendnlnm terms a leverpiv0tedat6,

"' the lengthoffwhich is -froin the pivot to that 20 may be In accordance with the provisions of the patentstatntes the principle of the invention has been described, together 'witli thie amiarat'us which is nowconsideredtorepresent the,

best embodiment thereof, but it is desired to have it understoml that the apparatus SlNMZL'dl is merely illnstrative',"and 'that the-invention may be carried outdn otherways;-

The invention having been described, what is' c-lii-imed as new and desired to be secured by Letters Patent, is as follows:

1: 'A sc-alefcoiri-prising a centrally. pivoted beam, a. pair of pans carried by the beam and above the horizontal plane 0 pi we; one, of said pans" being onea'ch sideiot the-vertical plane 'ofthe'" pivotal point; apa'ir of *weights rigidly carried-by the beam one on ea-cl-i side of'the Vertical, J'l'ane off tlie pivot andbelow the horizontal p aneof tlrepivotal pointi 2 A scale, comprisinga-centrally-pivoted I bea1n5 a pair "of pans carriedby' the. bean'r and above the horizontal plane 'of the": ivot'jon'e of saidpans 'beinggon each. side o the verticalplane of the pivotalp'oint,"- a p'air of Weights rigidly carried by, the beani -one'on each side ofthe' vertical plane o f tli epivot and below the horizontal plane ecu-1t pivotal point; said weights being equidistant" from the-pivotal. point. j 1

3 A' scale; comprising a 'c'entrally aivnted beam a pair'of pan-s carried by the beamt'atid above'the horizontal plane ofthepivot', one

plane of the pivotal point, pair srweights rigidly carriedfby thebeain'oiie oir each-side the vertical plane of the pivot and "below the horizontal plane'ofitlie pivotal point, said of said 'pans being oil-each side ofthe'vertica'l weights being-of equal specifivgra vityi and eql idistant froni the'jpi'votali'pointi 4; A- scale, comprising a' centrally pivoted bearn a pair of pans carried the beam and above the horizontal"plane" of tlrepivo't', one of said p e Weights carried by; tl-iebearn one- 'on each sidefof th e vertical plane of t-lfefpivot an d below the horizontal plane of'the' pivotal pans being on each side of th'evertical V thepiyo'tal point, a"'-pair"of spherical pointjsaid" weights bei-ng of e'quallspeci'fic po A scale inchiding} a'centrally' pivoted beam," having. weighted pendiilurns at each gravity and v.eq'nidi tram" pivdtal side of. the center there'of, pointer midway posed; adj a'eentj said pointert j 6 A'sc'ale 'cornprisi'ngacentrally" pivoted beam, a'pointerri idly secnredsto the" ota'lpoirit, a'pan' carried at ea'ch'fen d' of the beam and abovethe pivotal poiiit; ald ia'l oted relativelv to the beam and in axial ahnement. with the iizot" of the-beam arr d ct)- an extend n reafin fupwma metreivoperating 'witli't epbint'eflla-weiglit carried the dial and below its p'ivot whereliy the v dial will 3 be plfiin'b irrespective" ofthe anglilarity of the beam orof the scale as a Whole, a compensating Weight carried by the beam between its pivot and each pan, said Weights being below the pivotal point and equidistant from the pivotal point and of equal specific gravity.

7. A scale, comprising a base, a pivoted beam carried by the base, a member carried on the base and pivoted in axial alineme-nt with the pivotal point of the beam, said memher being pivoted relatively to the beam, a. depending Weight carried by the member andbelow the pivot thereof whereby said member will remain in constant position irrespective of the angularposition of the base.

8. A scale, comprising a centrally pivoted beam, a pair of pans carried by the beam and above the horizontal plane of the pivot, one

of said pans being 011 each side of the vertical plane of the pivotal point, Weighted means rigidly suspended from the beam on each side of the vertical plane of the pivot below the'horizontal plane of the pivotal point, said means being of equal specific gravity and also equidistant each side laterally of tlie pivotal point.

This specification signed this 30th day of April, 1924.

HUGH M. CAMERON. 

